William a



(No Model.)

. W. A. D'. GRAHAM.

PNBUMATIG TIRE.

No. 592,138. 'Patented Oct. 19, 1897.

www0/mao to a wheel-rim.

Ntra STATES WILLIAM A. D. GRAHAM, or owEN soUND, CANADAL' f PN EUIVATIC TIRE.

SPECIFICATION forming part of Letters Patent No. 592,138, dated October 19, 189'?.

Application led March 28, 1896. Serial No. 585,257. (No model To all whom t may concern:

Beit known that LWILLIAM A. D. GRAHAM, a citizen of Canada, and a Subj ect of the Queen ada,have invented a certain new, useful, and

valuable Improvement in Pneumatic Tires, of which the following is a full, clear, and exact description.

My invention has relation to pneumatic tires for wheels. bicycle-wheels.

It consists in the novel construction and arrangement of `its parts, as hereinafter described.

In the accompanying drawings, Figure 1 is a transverse sectional view of the tire applied Fig. 2 is a transverse sectional vieW showing a modication. Fig. 4 is an end view of the cover-locking means. Fig. 5 is a perspective view of the cover-locking means. Fig. 6 is a perspective view of the cover.

The rim 1 may be made of wood, or it may be made of metal, as indicated by the dotted line 2 in Fig. 2. The periphery of the rim is provided with suitable recesses 3 3, as shown inv Fig. 1, or it may be concaved, as shown in Fig. 2, said recesses or concavity extending all the way around the rim.

The locking means or device consists of the fiexible strip 4, having at each of its outer edges the abruptly-enlarged grips 5 5, the outer parts of the said grips tapering to an edge. To the under side of the strip 4, and along the middle of the same, is attached the flexible strip 6. The said strip 6 is attached to the strip 4 at an intermediate point, thus leaving the edges of the strip 6 free, as indicated in Fig. 4. The strip 6 may be of the same thickness through, as indicated by the heavy lines in Fig. 4, or the outer edges of the strip may be provided with the grips 7 7,`as

indicated by the dott-ed lines in Fig. 4 and the heavy lines inFig. 2. The grips 7 7 are similar in construction to the grips 5 5. The

enlargement of the grips 7 7 extend toward the grips 5 5, thus leaving between the two sets of grips a cavityadapted to receive'the edges of the tire-cover 8.

It is especially adapted for eled, as indicated by the dotted lines 9 9 in Fig. 1.

The cover 8 consists of rubber or other exible material. Vhen rubber is used, it is preferable to line the inside of the cover with canvas or other non-elastic material, as shown at 10 in Fig. 6. The edges of the cover 8 are merged intol the arrow-head shape enlarge,- 'mentsll 11, and said enlargements 11 11 are adapted to pass between the grips 5 5 and 7 7 and interlock therewith. The cover 8 is provided on its outer side and near each enlargement llwith a line or depression 12. the cover is in place on the rim, this line or depression 12 is in the immediate vicinity of the rim 1 or the grip 7, and thus indicating that the enlargements 11 and the two sets of grips are interlocked. (See Fig. 1.)

The air-tube 13 is located in the cover 8,A

and when said tube is inflated it rmly locks and holds the parts, as shown in Figs. 1 and 2. In order to remove the cover 8 from the wheel, it is simply'necessary to exhaust the air from the tube 13, and the cover 8 and the tube 13 may be readily removed from the wheel.

Having described my invention, what I claimas new, and desire to secure by Letters Paten-t, vis-'` f Y A pneumatic tire consisting of an air-tube, a detachable cover consisting of a flexible mate`rial',`sa`.idt cover having at each edge and on each side of the edge an enlargement, the rear edges of-A the enlargements forming plane surfaces and extending at an abrupt angle to the surfaces of the body portion of the cover, the

-forwardportions of the enlargements being beveled 'and meeting at. a vcommon edge, a flexible stripV having at both its edges protru- 'sion-sthe inner edge of said protrusions form- When IOO

Io face of their supports, the last said gripping protrusions adapted to act in eonj unotion with the gripping protrusions on the first said strip in interlocking with the enlargements on the outer Cover.

In testimony whereof I affix my signature 15 in presence of two Witnesses.

WILLIAM A. D. GRAHAM. fitnessesz W. N. CHIsHoLM, M. CAVANAGH. 

